analyzer: add tests for #360 (#361)

Author: quasilyte

analyzer/testdata/src/regression/issue360.go

@@ -0,0 +1,32 @@
+package regression
+
+import "strings"
+
+func _(s1, s2 string) {
+	_ = map[int]int{
+		strings.Compare("", ""): 0, // want `\Qdon't use strings.Compare`
+	}
+
+	_ = map[int]int{
+		10: strings.Compare("", ""), // want `\Qdon't use strings.Compare`
+	}
+
+	_ = map[int]string{
+		10:                      "a",
+		strings.Compare(s1, s2): s2, // want `\Qdon't use strings.Compare`
+		20:                      "b",
+	}
+
+	_ = map[int]string{
+		10:                      "a",
+		20:                      "b",
+		strings.Compare(s1, s2): s2, // want `\Qdon't use strings.Compare`
+	}
+
+	_ = map[int]string{
+		strings.Compare(s1, s2): s2, // want `\Qdon't use strings.Compare`
+		10:                      "a",
+		20:                      "b",
+	}
+
+}

analyzer/testdata/src/regression/rules.go

@@ -64,3 +64,10 @@ func issue315(m dsl.Matcher) {
 			!m["arg"].Type.Is(`error`),
 	).Report(`return concrete type instead of $arg`).At(m["name"])
 }
+
+func issue360(m dsl.Matcher) {
+	m.Match(`$_{$*_, $_: strings.Compare($s1, $_), $*_}`,
+		`$_{$*_, strings.Compare($s1, $_): $_, $*_}`).
+		Report(`don't use strings.Compare`).
+		At(m["s1"])
+}