Deduplicate fuzz cases on the frontend before they are displayed.

fuzzer/go/fuzzcache/fuzzcache_test.go

 package fuzzcache
 
 import (
         "os"
         "reflect"
         "testing"
 
         "go.skia.org/infra/fuzzer/go/common"
         "go.skia.org/infra/fuzzer/go/frontend/data"
         "go.skia.org/infra/go/testutils"
@@ skipping 53 matching lines @@
                 t.Errorf("Should have seen error, but did not")
         }
 }
 
 func deleteBeforeTest(t *testing.T) {
         if err := os.Remove(TEST_DB_PATH); err != nil && !os.IsNotExist(err) {
                 t.Fatalf("Could not delete %s: %s", TEST_DB_PATH, err)
         }
 }
 
-func makeStacktrace(file, function string, line int) data.StackTrace {
-        return data.StackTrace{
-                Frames: []data.StackTraceFrame{
-                        {
-                                PackageName:  "mock/package/",
-                                FileName:     file,
-                                LineNumber:   line,
-                                FunctionName: function,
-                        },
-                },
-        }
-}
-
 var expectedFuzzNames = []string{"aaaa", "bbbb", "cccc", "dddd", "eeee", "ffff", "gggg"}
 
-var mockFlags = []string{"foo", "bar"}
-
-var mockPictureDetails = map[string]data.FuzzReport{
-        "aaaa": data.FuzzReport{
-                DebugStackTrace:   makeStacktrace("alpha", "beta", 16),
-                ReleaseStackTrace: makeStacktrace("alpha", "beta", 16),
-                DebugFlags:        mockFlags,
-                FuzzName:          "aaaa",
-                FuzzCategory:      "skpicture",
-        },
-        "bbbb": data.FuzzReport{
-                DebugStackTrace:   makeStacktrace("alpha", "beta", 16),
-                ReleaseStackTrace: data.StackTrace{},
-                DebugFlags:        mockFlags,
-                FuzzName:          "bbbb",
-                FuzzCategory:      "skpicture",
-        },
-        "cccc": data.FuzzReport{
-                DebugStackTrace:   makeStacktrace("alpha", "beta", 16),
-                ReleaseStackTrace: makeStacktrace("alpha", "gamma", 26),
-                DebugFlags:        mockFlags,
-                FuzzName:          "cccc",
-                FuzzCategory:      "skpicture",
-        },
-        "dddd": data.FuzzReport{
-                DebugStackTrace:   makeStacktrace("alpha", "gamma", 43),
-                ReleaseStackTrace: makeStacktrace("delta", "epsilon", 125),
-                DebugFlags:        mockFlags,
-                FuzzName:          "dddd",
-                FuzzCategory:      "skpicture",
-        },
-        "eeee": data.FuzzReport{
-                DebugStackTrace:   data.StackTrace{},
-                ReleaseStackTrace: data.StackTrace{},
-                DebugFlags:        mockFlags,
-                FuzzName:          "eeee",
-                FuzzCategory:      "skpicture",
-        },
-        "ffff": data.FuzzReport{
-                DebugStackTrace:   makeStacktrace("alpha", "beta", 16),
-                ReleaseStackTrace: makeStacktrace("alpha", "beta", 16),
-                DebugFlags:        mockFlags,
-                FuzzName:          "ffff",
-                FuzzCategory:      "skpicture",
-        },
-        "gggg": data.FuzzReport{
-                DebugStackTrace:   makeStacktrace("delta", "epsilon", 122),
-                ReleaseStackTrace: data.StackTrace{},
-                DebugFlags:        mockFlags,
-                FuzzName:          "gggg",
-                FuzzCategory:      "skpicture",
-        },
-}
-
-var mockAPIDetails = map[string]data.FuzzReport{
-        "hhhh": data.FuzzReport{
-                DebugStackTrace:   makeStacktrace("alpha", "beta", 16),
-                ReleaseStackTrace: makeStacktrace("alpha", "beta", 16),
-                DebugFlags:        mockFlags,
-                FuzzName:          "hhhh",
-                FuzzCategory:      "api",
-        },
-        "iiii": data.FuzzReport{
-                DebugStackTrace:   makeStacktrace("alpha", "beta", 16),
-                ReleaseStackTrace: data.StackTrace{},
-                DebugFlags:        mockFlags,
-                FuzzName:          "iiii",
-                FuzzCategory:      "api",
-        },
-}
-
 var expectedPictureTree = data.FuzzReportTree{
         data.FileFuzzReport{
                 FileName: "mock/package/alpha", Count: 4, Functions: []data.FunctionFuzzReport{
                         data.FunctionFuzzReport{
                                 FunctionName: "beta", Count: 3, LineNumbers: []data.LineFuzzReport{
                                         data.LineFuzzReport{
-                                                LineNumber: 16, Count: 3, Details: []data.FuzzReport{mockPictureDetails["aaaa"], mockPictureDetails["bbbb"], mockPictureDetails["ffff"]},
+                                                LineNumber: 16, Count: 3, Details: []data.FuzzReport{data.MockReport("skpicture", "aaaa"), data.MockReport("skpicture", "bbbb"), data.MockReport("skpicture", "ffff")},
                                         },
                                 },
                         }, data.FunctionFuzzReport{
                                 FunctionName: "gamma", Count: 1, LineNumbers: []data.LineFuzzReport{
                                         data.LineFuzzReport{
-                                                LineNumber: 26, Count: 1, Details: []data.FuzzReport{mockPictureDetails["cccc"]},
+                                                LineNumber: 26, Count: 1, Details: []data.FuzzReport{data.MockReport("skpicture", "cccc")},
                                         },
                                 },
                         },
                 },
         },
         data.FileFuzzReport{
                 FileName: "mock/package/delta", Count: 2, Functions: []data.FunctionFuzzReport{
                         data.FunctionFuzzReport{
                                 FunctionName: "epsilon", Count: 2, LineNumbers: []data.LineFuzzReport{
                                         data.LineFuzzReport{
-                                                LineNumber: 122, Count: 1, Details: []data.FuzzReport{mockPictureDetails["gggg"]},
+                                                LineNumber: 122, Count: 1, Details: []data.FuzzReport{data.MockReport("skpicture", "gggg")},
                                         },
                                         data.LineFuzzReport{
-                                                LineNumber: 125, Count: 1, Details: []data.FuzzReport{mockPictureDetails["dddd"]},
+                                                LineNumber: 125, Count: 1, Details: []data.FuzzReport{data.MockReport("skpicture", "dddd")},
                                         },
                                 },
                         },
                 },
         },
         data.FileFuzzReport{
                 FileName: common.UNKNOWN_FILE, Count: 1, Functions: []data.FunctionFuzzReport{
                         data.FunctionFuzzReport{
                                 FunctionName: common.UNKNOWN_FUNCTION, Count: 1, LineNumbers: []data.LineFuzzReport{
                                         data.LineFuzzReport{
-                                                LineNumber: -1, Count: 1, Details: []data.FuzzReport{mockPictureDetails["eeee"]},
+                                                LineNumber: -1, Count: 1, Details: []data.FuzzReport{data.MockReport("skpicture", "eeee")},
                                         },
                                 },
                         },
                 },
         },
 }
 
 var expectedAPITree = data.FuzzReportTree{
         data.FileFuzzReport{
                 FileName: "mock/package/alpha", Count: 2, Functions: []data.FunctionFuzzReport{
                         data.FunctionFuzzReport{
                                 FunctionName: "beta", Count: 2, LineNumbers: []data.LineFuzzReport{
                                         data.LineFuzzReport{
-                                                LineNumber: 16, Count: 2, Details: []data.FuzzReport{mockAPIDetails["hhhh"], mockAPIDetails["iiii"]},
+                                                LineNumber: 16, Count: 2, Details: []data.FuzzReport{data.MockReport("api", "hhhh"), data.MockReport("api", "iiii")},
                                         },
                                 },
                         },
                 },
         },
 }