go/ast/astutil: add tests for UsesImport.
Change-Id: I05e9897b2ac858e1c3cc0d54f9da74e34f72f9e2
Reviewed-on: https://go-review.googlesource.com/27002
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
diff --git a/go/ast/astutil/imports_test.go b/go/ast/astutil/imports_test.go
index f727f5d1..3f6d00d 100644
--- a/go/ast/astutil/imports_test.go
+++ b/go/ast/astutil/imports_test.go
@@ -1145,3 +1145,177 @@
}
}
}
+
+var usesImportTests = []struct {
+ name string
+ path string
+ in string
+ want bool
+}{
+ {
+ name: "no packages",
+ path: "io",
+ in: `package foo
+`,
+ want: false,
+ },
+ {
+ name: "import.1",
+ path: "io",
+ in: `package foo
+
+import "io"
+
+var _ io.Writer
+`,
+ want: true,
+ },
+ {
+ name: "import.2",
+ path: "io",
+ in: `package foo
+
+import "io"
+`,
+ want: false,
+ },
+ {
+ name: "import.3",
+ path: "io",
+ in: `package foo
+
+import "io"
+
+var io = 42
+`,
+ want: false,
+ },
+ {
+ name: "import.4",
+ path: "io",
+ in: `package foo
+
+import i "io"
+
+var _ i.Writer
+`,
+ want: true,
+ },
+ {
+ name: "import.5",
+ path: "io",
+ in: `package foo
+
+import i "io"
+`,
+ want: false,
+ },
+ {
+ name: "import.6",
+ path: "io",
+ in: `package foo
+
+import i "io"
+
+var i = 42
+var io = 42
+`,
+ want: false,
+ },
+ {
+ name: "import.7",
+ path: "encoding/json",
+ in: `package foo
+
+import "encoding/json"
+
+var _ json.Encoder
+`,
+ want: true,
+ },
+ {
+ name: "import.8",
+ path: "encoding/json",
+ in: `package foo
+
+import "encoding/json"
+`,
+ want: false,
+ },
+ {
+ name: "import.9",
+ path: "encoding/json",
+ in: `package foo
+
+import "encoding/json"
+
+var json = 42
+`,
+ want: false,
+ },
+ {
+ name: "import.10",
+ path: "encoding/json",
+ in: `package foo
+
+import j "encoding/json"
+
+var _ j.Encoder
+`,
+ want: true,
+ },
+ {
+ name: "import.11",
+ path: "encoding/json",
+ in: `package foo
+
+import j "encoding/json"
+`,
+ want: false,
+ },
+ {
+ name: "import.12",
+ path: "encoding/json",
+ in: `package foo
+
+import j "encoding/json"
+
+var j = 42
+var json = 42
+`,
+ want: false,
+ },
+ {
+ name: "import.13",
+ path: "io",
+ in: `package foo
+
+import _ "io"
+`,
+ want: true,
+ },
+ {
+ name: "import.14",
+ path: "io",
+ in: `package foo
+
+import . "io"
+`,
+ want: true,
+ },
+}
+
+func TestUsesImport(t *testing.T) {
+ fset := token.NewFileSet()
+ for _, test := range usesImportTests {
+ f, err := parser.ParseFile(fset, "test.go", test.in, 0)
+ if err != nil {
+ t.Errorf("%s: %v", test.name, err)
+ continue
+ }
+ got := UsesImport(f, test.path)
+ if got != test.want {
+ t.Errorf("UsesImport(%s)=%v, want %v", test.name, got, test.want)
+ }
+ }
+}
