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Unified Diff: pkg/dev_compiler/test/codegen/expect.dart

Issue 2413073002: Start cleaning up the HTML tests. (Closed)
Patch Set: Unfork expect.dart. Created 4 years, 2 months ago
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Index: pkg/dev_compiler/test/codegen/expect.dart
diff --git a/pkg/dev_compiler/test/codegen/expect.dart b/pkg/dev_compiler/test/codegen/expect.dart
deleted file mode 100644
index 555aee8384e9ea22029e0441dcd7bab2b487ade8..0000000000000000000000000000000000000000
--- a/pkg/dev_compiler/test/codegen/expect.dart
+++ /dev/null
@@ -1,475 +0,0 @@
-// Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file
-// for details. All rights reserved. Use of this source code is governed by a
-// BSD-style license that can be found in the LICENSE file.
-
-/**
- * This library contains an Expect class with static methods that can be used
- * for simple unit-tests.
- */
-library expect;
-
-/**
- * Expect is used for tests that do not want to make use of the
- * Dart unit test library - for example, the core language tests.
- * Third parties are discouraged from using this, and should use
- * the expect() function in the unit test library instead for
- * test assertions.
- */
-class Expect {
- /**
- * Return a slice of a string.
- *
- * The slice will contain at least the substring from [start] to the lower of
- * [end] and `start + length`.
- * If the result is no more than `length - 10` characters long,
- * context may be added by extending the range of the slice, by decreasing
- * [start] and increasing [end], up to at most length characters.
- * If the start or end of the slice are not matching the start or end of
- * the string, ellipses are added before or after the slice.
- * Control characters may be encoded as "\xhh" codes.
- */
- static String _truncateString(String string, int start, int end, int length) {
- if (end - start > length) {
- end = start + length;
- } else if (end - start < length) {
- int overflow = length - (end - start);
- if (overflow > 10) overflow = 10;
- // Add context.
- start = start - ((overflow + 1) ~/ 2);
- end = end + (overflow ~/ 2);
- if (start < 0) start = 0;
- if (end > string.length) end = string.length;
- }
- if (start == 0 && end == string.length) return string;
- StringBuffer buf = new StringBuffer();
- if (start > 0) buf.write("...");
- for (int i = start; i < end; i++) {
- int code = string.codeUnitAt(i);
- if (code < 0x20) {
- buf.write(r"\x");
- buf.write("0123456789abcdef"[code ~/ 16]);
- buf.write("0123456789abcdef"[code % 16]);
- } else {
- buf.writeCharCode(string.codeUnitAt(i));
- }
- }
- if (end < string.length) buf.write("...");
- return buf.toString();
- }
-
- /**
- * Find the difference between two strings.
- *
- * This finds the first point where two strings differ, and returns
- * a text describing the difference.
- *
- * For small strings (length less than 20) nothing is done, and null is
- * returned. Small strings can be compared visually, but for longer strings
- * only a slice containing the first difference will be shown.
- */
- static String _stringDifference(String expected, String actual) {
- if (expected.length < 20 && actual.length < 20) return null;
- for (int i = 0; i < expected.length && i < actual.length; i++) {
- if (expected.codeUnitAt(i) != actual.codeUnitAt(i)) {
- int start = i;
- i++;
- while (i < expected.length && i < actual.length) {
- if (expected.codeUnitAt(i) == actual.codeUnitAt(i)) break;
- i++;
- }
- int end = i;
- var truncExpected = _truncateString(expected, start, end, 20);
- var truncActual = _truncateString(actual, start, end, 20);
- return "at index $start: Expected <$truncExpected>, "
- "Found: <$truncActual>";
- }
- }
- return null;
- }
-
- /**
- * Checks whether the expected and actual values are equal (using `==`).
- */
- static void equals(var expected, var actual, [String reason = null]) {
- if (expected == actual) return;
- String msg = _getMessage(reason);
- if (expected is String && actual is String) {
- String stringDifference = _stringDifference(expected, actual);
- if (stringDifference != null) {
- _fail("Expect.equals($stringDifference$msg) fails.");
- }
- }
- _fail("Expect.equals(expected: <$expected>, actual: <$actual>$msg) fails.");
- }
-
- /**
- * Checks whether the actual value is a bool and its value is true.
- */
- static void isTrue(var actual, [String reason = null]) {
- if (_identical(actual, true)) return;
- String msg = _getMessage(reason);
- _fail("Expect.isTrue($actual$msg) fails.");
- }
-
- /**
- * Checks whether the actual value is a bool and its value is false.
- */
- static void isFalse(var actual, [String reason = null]) {
- if (_identical(actual, false)) return;
- String msg = _getMessage(reason);
- _fail("Expect.isFalse($actual$msg) fails.");
- }
-
- /**
- * Checks whether [actual] is null.
- */
- static void isNull(actual, [String reason = null]) {
- if (null == actual) return;
- String msg = _getMessage(reason);
- _fail("Expect.isNull(actual: <$actual>$msg) fails.");
- }
-
- /**
- * Checks whether [actual] is not null.
- */
- static void isNotNull(actual, [String reason = null]) {
- if (null != actual) return;
- String msg = _getMessage(reason);
- _fail("Expect.isNotNull(actual: <$actual>$msg) fails.");
- }
-
- /**
- * Checks whether the expected and actual values are identical
- * (using `identical`).
- */
- static void identical(var expected, var actual, [String reason = null]) {
- if (_identical(expected, actual)) return;
- String msg = _getMessage(reason);
- _fail("Expect.identical(expected: <$expected>, actual: <$actual>$msg) "
- "fails.");
- }
-
- // Unconditional failure.
- static void fail(String msg) {
- _fail("Expect.fail('$msg')");
- }
-
- /**
- * Failure if the difference between expected and actual is greater than the
- * given tolerance. If no tolerance is given, tolerance is assumed to be the
- * value 4 significant digits smaller than the value given for expected.
- */
- static void approxEquals(num expected, num actual,
- [num tolerance = null, String reason = null]) {
- if (tolerance == null) {
- tolerance = (expected / 1e4).abs();
- }
- // Note: use !( <= ) rather than > so we fail on NaNs
- if ((expected - actual).abs() <= tolerance) return;
-
- String msg = _getMessage(reason);
- _fail('Expect.approxEquals(expected:<$expected>, actual:<$actual>, '
- 'tolerance:<$tolerance>$msg) fails');
- }
-
- static void notEquals(unexpected, actual, [String reason = null]) {
- if (unexpected != actual) return;
- String msg = _getMessage(reason);
- _fail("Expect.notEquals(unexpected: <$unexpected>, actual:<$actual>$msg) "
- "fails.");
- }
-
- /**
- * Checks that all elements in [expected] and [actual] are equal `==`.
- * This is different than the typical check for identity equality `identical`
- * used by the standard list implementation. It should also produce nicer
- * error messages than just calling `Expect.equals(expected, actual)`.
- */
- static void listEquals(List expected, List actual, [String reason = null]) {
- String msg = _getMessage(reason);
- int n = (expected.length < actual.length) ? expected.length : actual.length;
- for (int i = 0; i < n; i++) {
- if (expected[i] != actual[i]) {
- _fail('Expect.listEquals(at index $i, '
- 'expected: <${expected[i]}>, actual: <${actual[i]}>$msg) fails');
- }
- }
- // We check on length at the end in order to provide better error
- // messages when an unexpected item is inserted in a list.
- if (expected.length != actual.length) {
- _fail('Expect.listEquals(list length, '
- 'expected: <${expected.length}>, actual: <${actual.length}>$msg) '
- 'fails: Next element <'
- '${expected.length > n ? expected[n] : actual[n]}>');
- }
- }
-
- /**
- * Checks that all [expected] and [actual] have the same set of keys (using
- * the semantics of [Map.containsKey] to determine what "same" means. For
- * each key, checks that the values in both maps are equal using `==`.
- */
- static void mapEquals(Map expected, Map actual, [String reason = null]) {
- String msg = _getMessage(reason);
-
- // Make sure all of the values are present in both and match.
- for (final key in expected.keys) {
- if (!actual.containsKey(key)) {
- _fail('Expect.mapEquals(missing expected key: <$key>$msg) fails');
- }
-
- Expect.equals(expected[key], actual[key]);
- }
-
- // Make sure the actual map doesn't have any extra keys.
- for (final key in actual.keys) {
- if (!expected.containsKey(key)) {
- _fail('Expect.mapEquals(unexpected key: <$key>$msg) fails');
- }
- }
- }
-
- /**
- * Specialized equality test for strings. When the strings don't match,
- * this method shows where the mismatch starts and ends.
- */
- static void stringEquals(String expected, String actual,
- [String reason = null]) {
- if (expected == actual) return;
-
- String msg = _getMessage(reason);
- String defaultMessage =
- 'Expect.stringEquals(expected: <$expected>", <$actual>$msg) fails';
-
- if ((expected == null) || (actual == null)) {
- _fail('$defaultMessage');
- }
-
- // Scan from the left until we find the mismatch.
- int left = 0;
- int right = 0;
- int eLen = expected.length;
- int aLen = actual.length;
-
- while (true) {
- if (left == eLen || left == aLen || expected[left] != actual[left]) {
- break;
- }
- left++;
- }
-
- // Scan from the right until we find the mismatch.
- int eRem = eLen - left; // Remaining length ignoring left match.
- int aRem = aLen - left;
- while (true) {
- if (right == eRem ||
- right == aRem ||
- expected[eLen - right - 1] != actual[aLen - right - 1]) {
- break;
- }
- right++;
- }
-
- // First difference is at index `left`, last at `length - right - 1`
- // Make useful difference message.
- // Example:
- // Diff (1209..1209/1246):
- // ...,{"name":"[ ]FallThroug...
- // ...,{"name":"[ IndexError","kind":"class"},{"name":" ]FallThroug...
- // (colors would be great!)
-
- // Make snippets of up to ten characters before and after differences.
-
- String leftSnippet = expected.substring(left < 10 ? 0 : left - 10, left);
- int rightSnippetLength = right < 10 ? right : 10;
- String rightSnippet =
- expected.substring(eLen - right, eLen - right + rightSnippetLength);
-
- // Make snippets of the differences.
- String eSnippet = expected.substring(left, eLen - right);
- String aSnippet = actual.substring(left, aLen - right);
-
- // If snippets are long, elide the middle.
- if (eSnippet.length > 43) {
- eSnippet = eSnippet.substring(0, 20) +
- "..." +
- eSnippet.substring(eSnippet.length - 20);
- }
- if (aSnippet.length > 43) {
- aSnippet = aSnippet.substring(0, 20) +
- "..." +
- aSnippet.substring(aSnippet.length - 20);
- }
- // Add "..." before and after, unless the snippets reach the end.
- String leftLead = "...";
- String rightTail = "...";
- if (left <= 10) leftLead = "";
- if (right <= 10) rightTail = "";
-
- String diff = '\nDiff ($left..${eLen - right}/${aLen - right}):\n'
- '$leftLead$leftSnippet[ $eSnippet ]$rightSnippet$rightTail\n'
- '$leftLead$leftSnippet[ $aSnippet ]$rightSnippet$rightTail';
- _fail("$defaultMessage$diff");
- }
-
- /**
- * Checks that every element of [expected] is also in [actual], and that
- * every element of [actual] is also in [expected].
- */
- static void setEquals(Iterable expected, Iterable actual,
- [String reason = null]) {
- final missingSet = new Set.from(expected);
- missingSet.removeAll(actual);
- final extraSet = new Set.from(actual);
- extraSet.removeAll(expected);
-
- if (extraSet.isEmpty && missingSet.isEmpty) return;
- String msg = _getMessage(reason);
-
- StringBuffer sb = new StringBuffer("Expect.setEquals($msg) fails");
- // Report any missing items.
- if (!missingSet.isEmpty) {
- sb.write('\nExpected collection does not contain: ');
- }
-
- for (final val in missingSet) {
- sb.write('$val ');
- }
-
- // Report any extra items.
- if (!extraSet.isEmpty) {
- sb.write('\nExpected collection should not contain: ');
- }
-
- for (final val in extraSet) {
- sb.write('$val ');
- }
- _fail(sb.toString());
- }
-
- /**
- * Checks that [expected] is equivalent to [actual].
- *
- * If the objects are lists or maps, recurses into them.
- */
- static void deepEquals(Object expected, Object actual) {
- // Early exit check for equality.
- if (expected == actual) return;
-
- if (expected is List && actual is List) {
- int n =
- (expected.length < actual.length) ? expected.length : actual.length;
- for (int i = 0; i < n; i++) {
- deepEquals(expected[i], actual[i]);
- }
-
- // We check on length at the end in order to provide better error
- // messages when an unexpected item is inserted in a list.
- if (expected.length != actual.length) {
- _fail('Expect.deepEquals(list length, '
- 'expected: <${expected.length}>, actual: <${actual.length}>) '
- 'fails: Next element <'
- '${expected.length > n ? expected[n] : actual[n]}>');
- }
- } else if (expected is Map && actual is Map) {
- // Make sure all of the values are present in both and match.
- for (final key in expected.keys) {
- if (!actual.containsKey(key)) {
- _fail('Expect.deepEquals(missing expected key: <$key>) fails');
- }
-
- Expect.deepEquals(expected[key], actual[key]);
- }
-
- // Make sure the actual map doesn't have any extra keys.
- for (final key in actual.keys) {
- if (!expected.containsKey(key)) {
- _fail('Expect.deepEquals(unexpected key: <$key>) fails');
- }
- }
- } else if (expected is String && actual is String) {
- String stringDifference = _stringDifference(expected, actual);
- // If we get here, they should not be equal.
- assert(stringDifference != null);
- _fail("Expect.deepEquals($stringDifference) fails.");
- } else {
- _fail("Expect.deepEquals(expected: <$expected>, actual: <$actual>) "
- "fails.");
- }
- }
-
- /**
- * Calls the function [f] and verifies that it throws an exception.
- * The optional [check] function can provide additional validation
- * that the correct exception is being thrown. For example, to check
- * the type of the exception you could write this:
- *
- * Expect.throws(myThrowingFunction, (e) => e is MyException);
- */
- static void throws(void f(),
- [_CheckExceptionFn check = null, String reason = null]) {
- String msg = reason == null ? "" : "($reason)";
- if (f is! _Nullary) {
- // Only throws from executing the funtion body should count as throwing.
- // The failure to even call `f` should throw outside the try/catch.
- _fail("Expect.throws$msg: Function f not callable with zero arguments");
- }
- try {
- f();
- } catch (e, s) {
- if (check != null) {
- if (!check(e)) {
- _fail("Expect.throws$msg: Unexpected '$e'\n$s");
- }
- }
- return;
- }
- _fail('Expect.throws$msg fails: Did not throw');
- }
-
- static String _getMessage(String reason) =>
- (reason == null) ? "" : ", '$reason'";
-
- static void _fail(String message) {
- throw new ExpectException(message);
- }
-}
-
-bool _identical(a, b) => identical(a, b);
-
-typedef bool _CheckExceptionFn(exception);
-typedef _Nullary(); // Expect.throws argument must be this type.
-
-class ExpectException implements Exception {
- ExpectException(this.message);
- String toString() => message;
- String message;
-}
-
-/// Annotation class for testing of dart2js. Use this as metadata on method
-/// declarations to disable inlining of the annotated method.
-class NoInline {
- const NoInline();
-}
-
-/// Annotation class for testing of dart2js. Use this as metadata on method
-/// declarations to make the type inferrer trust the parameter and return types,
-/// effectively asserting the runtime values will (at least) be subtypes of the
-/// annotated types.
-///
-/// While the actually inferred type is guaranteed to be a subtype of the
-/// annotation, it often is more precise. In particular, if a method is only
-/// called with `null`, the inferrer will still infer null. To ensure that
-/// the annotated type is also the inferred type, additionally use
-/// [AssumeDynamic].
-class TrustTypeAnnotations {
- const TrustTypeAnnotations();
-}
-
-/// Annotation class for testing of dart2js. Use this as metadata on method
-/// declarations to disable closed world assumptions on parameters, effectively
-/// assuming that the runtime arguments could be any value. Note that the
-/// constraints due to [TrustTypeAnnotations] still apply.
-class AssumeDynamic {
- const AssumeDynamic();
-}

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