Implemented Input Files based testing

Author: Anmol202005

config/import-control-test.xml

@@ -7,4 +7,7 @@
     <allow pkg="org.junit"/>
     <allow pkg="org.openrewrite"/>
     <allow pkg="org.checkstyle"/>
+    <allow pkg="java.io"/>
+    <allow pkg="java.nio"/>
+
 </import-control>

src/test/java/org/checkstyle/autofix/recipe/UpperEllRecipeTest.java

@@ -3,38 +3,53 @@
 import static org.junit.jupiter.api.Assertions.assertTrue;
 import static org.openrewrite.java.Assertions.java;
 
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Paths;
+
 import org.junit.jupiter.api.Test;
 import org.openrewrite.test.RecipeSpec;
 import org.openrewrite.test.RewriteTest;
 
 public class UpperEllRecipeTest implements RewriteTest {
 
+    private static final String BASE_TEST_RESOURCES_PATH = "src/test/resources/org"
+            + "/checkstyle/autofix/recipe/";
+
     @Override
     public void defaults(RecipeSpec spec) {
         spec.recipe(new UpperEllRecipe());
     }
 
     @Test
-    void fixesLowercase() {
-        rewriteRun(
-
-            java(
-                "class Test {\n"
-                        + "    int value1 = 123l;\n"
-                        + "    long value2 = 0x123l;\n"
-                        + "    long value3 = 0123l;\n"
-                        + "    long value4 = 0b101l;\n"
-                        + "    String value5 = null;\n"
-                        + "}\n",
-                "class Test {\n"
-                        + "    int value1 = 123L;\n"
-                        + "    long value2 = 0x123L;\n"
-                        + "    long value3 = 0123L;\n"
-                        + "    long value4 = 0b101L;\n"
-                        + "    String value5 = null;\n"
-                        + "}\n"
-            )
-        );
+    void test1() throws IOException {
+        final String beforeCode = Files.readString(Paths.get(BASE_TEST_RESOURCES_PATH
+                        + "upperell/before/InputUpperEllTest.java"))
+                .replaceFirst("^\\s*package.*?;\\s*\\n?", "");
+
+        final String afterCode = Files.readString(Paths.get(BASE_TEST_RESOURCES_PATH
+                        + "upperell/after/InputUpperEllTest.java"))
+                .replaceFirst("^\\s*package.*?;\\s*\\n?", "");
+
+        rewriteRun(java(beforeCode, afterCode));
+
+        assertTrue(true, "Test completed successfully");
+    }
+
+    @Test
+    void test2() throws IOException {
+
+        final String beforeCode = Files.readString(Paths.get(BASE_TEST_RESOURCES_PATH
+                        + "upperell/before/InputUpperEllTest.java"))
+                .replaceFirst("^\\s*package.*?;\\s*\\n?", "");
+
+        final String afterCode = Files.readString(Paths.get(BASE_TEST_RESOURCES_PATH
+                        + "upperell/after/InputUpperEllTest.java"))
+                .replaceFirst("^\\s*package.*?;\\s*\\n?", "");
+
+        rewriteRun(java(beforeCode, afterCode));
+
         assertTrue(true, "Test completed successfully");
     }
+
 }

src/test/resources/org/checkstyle/autofix/recipe/upperell/after/InputUpperEllTest.java

@@ -0,0 +1,8 @@
+package org.checkstyle.autofix.recipe.upperell.after;
+
+public class InputUpperEllTest {
+    long decimal = 12345L;
+    long hex = 0xABCDL;
+    long octal = 511L;
+    long binary = 0b1010L;
+}

src/test/resources/org/checkstyle/autofix/recipe/upperell/after/InputUpperEllTest2.java

@@ -0,0 +1,20 @@
+package org.checkstyle.autofix.recipe.upperell.after;
+
+public class InputUpperEllTest2 {
+    static final long MAX = 9223372036854775807L;
+
+    long calculate(int x) {
+        return x * 1000L + 500L;
+    }
+
+    void process() {
+        long[] values = {10L, 20L, 30L};
+        long sum = values[0] + values[1] * 2L;
+
+        if (sum > 100L) {
+            System.out.println("Sum: " + (sum - 50L));
+        }
+
+        long mixed = 123L + 456L + 789L;
+    }
+}

src/test/resources/org/checkstyle/autofix/recipe/upperell/before/InputUpperEllTest.java

@@ -0,0 +1,8 @@
+package org.checkstyle.autofix.recipe.upperell.before;
+
+public class InputUpperEllTest {
+    long decimal = 12345l;
+    long hex = 0xABCDl;
+    long octal = 511L;
+    long binary = 0b1010l;
+}

src/test/resources/org/checkstyle/autofix/recipe/upperell/before/InputUpperEllTest2.java

@@ -0,0 +1,20 @@
+package org.checkstyle.autofix.recipe.upperell.before;
+
+public class InputUpperEllTest2 {
+    static final long MAX = 9223372036854775807l;
+
+    long calculate(int x) {
+        return x * 1000l + 500l;
+    }
+
+    void process() {
+        long[] values = {10l, 20l, 30l};
+        long sum = values[0] + values[1] * 2l;
+
+        if (sum > 100l) {
+            System.out.println("Sum: " + (sum - 50l));
+        }
+
+        long mixed = 123l + 456L + 789l;
+    }
+}