add test case

context_test.go

@@ -2059,15 +2059,54 @@ func TestRemoteIPFail(t *testing.T) {
 }
 
 func TestContextWithFallbackValueFromRequestContext(t *testing.T) {
+	tests := []struct {
+		name             string
+		getContextAndKey func() (*Context, interface{})
+		value            interface{}
+	}{
+		{
+			name: "c with struct context key",
+			getContextAndKey: func() (*Context, interface{}) {
 				var key struct{}
 				c := &Context{}
 				c.Request, _ = http.NewRequest("POST", "/", nil)
 				c.Request = c.Request.WithContext(context.WithValue(context.TODO(), key, "value"))
-
-	assert.Equal(t, "value", c.Value(key))
-
-	c2 := &Context{}
-	c2.Request, _ = http.NewRequest("POST", "/", nil)
-	c2.Request = c2.Request.WithContext(context.WithValue(context.TODO(), "key", "value2"))
-	assert.Equal(t, "value2", c2.Value("key"))
+				return c, key
+			},
+			value: "value",
+		},
+		{
+			name: "c with string context key",
+			getContextAndKey: func() (*Context, interface{}) {
+				c := &Context{}
+				c.Request, _ = http.NewRequest("POST", "/", nil)
+				c.Request = c.Request.WithContext(context.WithValue(context.TODO(), "key", "value"))
+				return c, "key"
+			},
+			value: "value",
+		},
+		{
+			name: "c with nil http.Request",
+			getContextAndKey: func() (*Context, interface{}) {
+				c := &Context{}
+				return c, "key"
+			},
+			value: nil,
+		},
+		{
+			name: "c with nil http.Request.Context()",
+			getContextAndKey: func() (*Context, interface{}) {
+				c := &Context{}
+				c.Request, _ = http.NewRequest("POST", "/", nil)
+				return c, "key"
+			},
+			value: nil,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			c, key := tt.getContextAndKey()
+			assert.Equal(t, tt.value, c.Value(key))
+		})
+	}
 }