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.teamai/skills/common/golang-naming/references/testing.md

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+# Test Naming
+
+## Test Functions
+
+Test functions follow `Test` + the name of what is being tested. Use underscores for subcases.
+
+```go
+func TestParseToken(t *testing.T) { ... }
+func TestServer_Handle(t *testing.T) { ... }           // method test
+func TestParseToken_InvalidInput(t *testing.T) { ... }  // subcase
+```
+
+## Table-Driven Tests
+
+Table-driven test case names SHOULD be **fully lowercase, descriptive phrases** — including acronyms. Use `input` for inputs and `expected` for expected outputs to make the data flow clear:
+
+```go
+tests := []struct {
+    name         string
+    input        string
+    expectedCode int
+    expectedErr  bool
+}{
+    {name: "empty input", input: "", expectedCode: 400, expectedErr: true},
+    {name: "valid token", input: "abc123", expectedCode: 200},
+    {name: "expired token", input: "exp", expectedCode: 401, expectedErr: true},
+    {name: "invalid id", input: "???", expectedCode: 400, expectedErr: true},  // "id" not "ID"
+}
+
+// Bad — mixed case in test names
+{name: "valid ID", ...}      // should be "valid id"
+{name: "Empty Input", ...}   // should be "empty input"
+```
+
+## Test Helpers
+
+Test helper functions that panic on failure conventionally use the `must` prefix: `mustLoadFixture()`, `mustParseURL()`.