Remove PlainTextPasswordEncoder from core

Issue: gh-4674

core/src/test/java/org/springframework/security/authentication/encoding/PlaintextPasswordEncoderTests.java

@@ -1,73 +0,0 @@
-/*
- * Copyright 2004, 2005, 2006 Acegi Technology Pty Limited
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package org.springframework.security.authentication.encoding;
-
-import static org.assertj.core.api.Assertions.assertThat;
-
-import org.junit.Test;
-
-/**
- * <p>
- * TestCase for PlaintextPasswordEncoder.
- * </p>
- *
- * @author colin sampaleanu
- * @author Ben Alex
- */
-public class PlaintextPasswordEncoderTests {
-
-	// ~ Methods
-	// ========================================================================================================
-	@Test
-	public void testBasicFunctionality() {
-		PlaintextPasswordEncoder pe = new PlaintextPasswordEncoder();
-
-		String raw = "abc123";
-		String rawDiffCase = "AbC123";
-		String badRaw = "abc321";
-		String salt = "THIS_IS_A_SALT";
-
-		String encoded = pe.encodePassword(raw, salt);
-		assertThat(encoded).isEqualTo("abc123{THIS_IS_A_SALT}");
-		assertThat(pe.isPasswordValid(encoded, raw, salt)).isTrue();
-		assertThat(pe.isPasswordValid(encoded, badRaw, salt)).isFalse();
-
-		// make sure default is not to ignore password case
-		assertThat(pe.isIgnorePasswordCase()).isFalse();
-		encoded = pe.encodePassword(rawDiffCase, salt);
-		assertThat(pe.isPasswordValid(encoded, raw, salt)).isFalse();
-
-		// now check for ignore password case
-		pe = new PlaintextPasswordEncoder();
-		pe.setIgnorePasswordCase(true);
-
-		// should be able to validate even without encoding
-		encoded = pe.encodePassword(rawDiffCase, salt);
-		assertThat(pe.isPasswordValid(encoded, raw, salt)).isTrue();
-		assertThat(pe.isPasswordValid(encoded, badRaw, salt)).isFalse();
-	}
-
-	@Test
-	public void testMergeDemerge() {
-		PlaintextPasswordEncoder pwd = new PlaintextPasswordEncoder();
-
-		String merged = pwd.encodePassword("password", "foo");
-		String[] demerged = pwd.obtainPasswordAndSalt(merged);
-		assertThat(demerged[0]).isEqualTo("password");
-		assertThat(demerged[1]).isEqualTo("foo");
-	}
-}