[Courgette] Initial Implementation of LabelManager.

courgette/consecutive_range_visitor_unittest.cc

+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "courgette/consecutive_range_visitor.h"
+
+#include <string>
+
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace courgette {
+
+TEST(ConsecutiveRangeVisitorTest, Basic) {
+  std::string s = "AAAAABZZZZOO";
+  ConsecutiveRangeVisitor<std::string::iterator> vis(s.begin(), s.end());
+  EXPECT_TRUE(vis.has_more());
+  EXPECT_EQ('A', *vis.cur());
+  EXPECT_EQ(5U, vis.repeat());
+  vis.advance();
+
+  EXPECT_TRUE(vis.has_more());
+  EXPECT_EQ('B', *vis.cur());
+  EXPECT_EQ(1U, vis.repeat());
+  vis.advance();
+
+  EXPECT_TRUE(vis.has_more());
+  EXPECT_EQ('Z', *vis.cur());
+  EXPECT_EQ(4U, vis.repeat());
+  vis.advance();
+
+  EXPECT_TRUE(vis.has_more());
+  EXPECT_EQ('O', *vis.cur());
+  EXPECT_EQ(2U, vis.repeat());
+  vis.advance();
+
+  EXPECT_FALSE(vis.has_more());
+}
+
+TEST(ConsecutiveRangeVisitorTest, UnitRanges) {
+  // Unsorted, no consecutive characters.
+  const char s[] = "elephant elephant";
+  ConsecutiveRangeVisitor<const char*> vis(std::begin(s), std::end(s) - 1);
+  for (const char* scan = &s[0]; *scan; ++scan) {
+    EXPECT_TRUE(vis.has_more());
+    EXPECT_EQ(*scan, *vis.cur());
+    EXPECT_EQ(1U, vis.repeat());
+    vis.advance();
+  }
+  EXPECT_FALSE(vis.has_more());
+}
+
+TEST(ConsecutiveRangeVisitorTest, SingleRange) {
+  for (size_t len = 1U; len < 10U; ++len) {
+    std::vector<int> v(len, 137);
+    ConsecutiveRangeVisitor<std::vector<int>::iterator> vis(v.begin(), v.end());
+    EXPECT_TRUE(vis.has_more());
+    EXPECT_EQ(137, *vis.cur());
+    EXPECT_EQ(len, vis.repeat());
+    vis.advance();
+    EXPECT_FALSE(vis.has_more());
+  }
+}
+
+TEST(ConsecutiveRangeVisitorTest, Empty) {
+  std::string s;
+  ConsecutiveRangeVisitor<std::string::iterator> vis(s.begin(), s.end());
+  EXPECT_FALSE(vis.has_more());
+}
+
+}  // namespace courgette