test: Use error.Is(errorType, errorInstance) to check for error equality (TheAlgorithms#668)

Co-authored-by: Rak Laptudirm <[email protected]>

Author: himanshu-patel-dev

search/binary_test.go

@@ -1,14 +1,17 @@
 package search
 
-import "testing"
+import (
+	"errors"
+	"testing"
+)
 
 func TestBinary(t *testing.T) {
 	for _, test := range searchTests {
 		actualValue, actualError := Binary(test.data, test.key, 0, len(test.data)-1)
 		if actualValue != test.expected {
 			t.Errorf("test '%s' failed: input array '%v' with key '%d', expected '%d', get '%d'", test.name, test.data, test.key, test.expected, actualValue)
 		}
-		if actualError != test.expectedError {
+		if !errors.Is(test.expectedError, actualError) {
 			t.Errorf("test '%s' failed: input array '%v' with key '%d', expected error '%s', get error '%s'", test.name, test.data, test.key, test.expectedError, actualError)
 		}
 	}
@@ -20,7 +23,7 @@ func TestBinaryIterative(t *testing.T) {
 		if actualValue != test.expected {
 			t.Errorf("test '%s' failed: input array '%v' with key '%d', expected '%d', get '%d'", test.name, test.data, test.key, test.expected, actualValue)
 		}
-		if actualError != test.expectedError {
+		if !errors.Is(test.expectedError, actualError) {
 			t.Errorf("test '%s' failed: input array '%v' with key '%d', expected error '%s', get error '%s'", test.name, test.data, test.key, test.expectedError, actualError)
 		}
 	}
@@ -32,7 +35,7 @@ func TestLowerBound(t *testing.T) {
 		if actualValue != test.expected {
 			t.Errorf("test '%s' failed: input array '%v' with key '%d', expected '%d', get '%d'", test.name, test.data, test.key, test.expected, actualValue)
 		}
-		if actualError != test.expectedError {
+		if !errors.Is(test.expectedError, actualError) {
 			t.Errorf("test '%s' failed: input array '%v' with key '%d', expected error '%s', get error '%s'", test.name, test.data, test.key, test.expectedError, actualError)
 		}
 	}
@@ -44,7 +47,7 @@ func TestUpperBound(t *testing.T) {
 		if actualValue != test.expected {
 			t.Errorf("test '%s' failed: input array '%v' with key '%d', expected '%d', get '%d'", test.name, test.data, test.key, test.expected, actualValue)
 		}
-		if actualError != test.expectedError {
+		if !errors.Is(test.expectedError, actualError) {
 			t.Errorf("test '%s' failed: input array '%v' with key '%d', expected error '%s', get error '%s'", test.name, test.data, test.key, test.expectedError, actualError)
 		}
 	}