1 files changed, 54 insertions, 0 deletions
diff --git a/src/mime/type_test.go b/src/mime/type_test.go
new file mode 100644
index 000000000..d2d254ae9
--- /dev/null
+++ b/src/mime/type_test.go
@@ -0,0 +1,54 @@
+// Copyright 2010 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package mime
+
+import (
+	"testing"
+)
+
+var typeTests = initMimeForTests()
+
+func TestTypeByExtension(t *testing.T) {
+	for ext, want := range typeTests {
+		val := TypeByExtension(ext)
+		if val != want {
+			t.Errorf("TypeByExtension(%q) = %q, want %q", ext, val, want)
+		}
+	}
+}
+
+func TestTypeByExtensionCase(t *testing.T) {
+	const custom = "test/test; charset=iso-8859-1"
+	const caps = "test/test; WAS=ALLCAPS"
+	if err := AddExtensionType(".TEST", caps); err != nil {
+		t.Fatalf("error %s for AddExtension(%s)", err, custom)
+	}
+	if err := AddExtensionType(".tesT", custom); err != nil {
+		t.Fatalf("error %s for AddExtension(%s)", err, custom)
+	}
+
+	// case-sensitive lookup
+	if got := TypeByExtension(".tesT"); got != custom {
+		t.Fatalf("for .tesT, got %q; want %q", got, custom)
+	}
+	if got := TypeByExtension(".TEST"); got != caps {
+		t.Fatalf("for .TEST, got %q; want %s", got, caps)
+	}
+
+	// case-insensitive
+	if got := TypeByExtension(".TesT"); got != custom {
+		t.Fatalf("for .TesT, got %q; want %q", got, custom)
+	}
+}
+
+func TestLookupMallocs(t *testing.T) {
+	n := testing.AllocsPerRun(10000, func() {
+		TypeByExtension(".html")
+		TypeByExtension(".HtML")
+	})
+	if n > 0 {
+		t.Errorf("allocs = %v; want 0", n)
+	}
+}