Improved code quality

errors.go

@@ -0,0 +1,39 @@
+package assert
+
+import (
+	"runtime/debug"
+	"strings"
+)
+
+const oneParameter = `
+  %s
+󰅙  assert.%s
+    󰯬  %v`
+
+const twoParameters = `
+  %s
+󰅙  assert.%s
+    󰯬  %v
+    󰯯  %v`
+
+// file returns the first line containing "_test.go" in the debug stack.
+func file() string {
+	stack := string(debug.Stack())
+	lines := strings.Split(stack, "\n")
+	name := ""
+
+	for _, line := range lines {
+		if strings.Contains(line, "_test.go") {
+			space := strings.LastIndex(line, " ")
+
+			if space != -1 {
+				line = line[:space]
+			}
+
+			name = strings.TrimSpace(line)
+			break
+		}
+	}
+
+	return name
+}