Removed useless hardcoded Strings in EnvUtils. (#4007)

apollo-core/src/main/java/com/ctrip/framework/apollo/core/enums/EnvUtils.java

@@ -18,31 +18,46 @@
 
 import com.ctrip.framework.apollo.core.utils.StringUtils;
 
+/**
+ * A utility class for the {@link Env} enum.
+ * <p>
+ * The class provides simple functionalities that extend the capabilities of {@link Env}
+ *
+ * @author Diego Krupitza(info@diegokrupitza.com)
+ */
 public final class EnvUtils {
-
+
+  /**
+   * Transforms a given String to its matching {@link Env}
+   *
+   * @param envName the String to convert
+   * @return the matching {@link Env} for the given String
+   */
   public static Env transformEnv(String envName) {
     if (StringUtils.isBlank(envName)) {
       return Env.UNKNOWN;
     }
-    switch (envName.trim().toUpperCase()) {
-      case "LPT":
-        return Env.LPT;
-      case "FAT":
-      case "FWS":
-        return Env.FAT;
-      case "UAT":
-        return Env.UAT;
-      case "PRO":
-      case "PROD": //just in case
-        return Env.PRO;
-      case "DEV":
-        return Env.DEV;
-      case "LOCAL":
-        return Env.LOCAL;
-      case "TOOLS":
-        return Env.TOOLS;
-      default:
-        return Env.UNKNOWN;
+
+    String cleanedEnvName = envName.trim().toUpperCase();
+
+    // fix up in case there is a typo
+    // like prod/pro
+    if (cleanedEnvName.equals("PROD")) {
+      return Env.PRO;
+    }
+
+    if (cleanedEnvName.equals("FWS")) {
+      // special case that FAT & FWS
+      // should return the same
+      return Env.FAT;
+    }
+
+    try {
+      return Env.valueOf(cleanedEnvName);
+    } catch (IllegalArgumentException e) {
+      // the name could not be found
+      // or there is a typo we dont handle
+      return Env.UNKNOWN;
     }
   }
 }

apollo-core/src/test/java/com/ctrip/framework/apollo/core/enums/EnvUtilsTest.java

@@ -16,7 +16,7 @@
  */
 package com.ctrip.framework.apollo.core.enums;
 
-import static org.junit.Assert.*;
+import static org.junit.Assert.assertEquals;
 
 import org.junit.Test;
 
@@ -41,4 +41,26 @@ public void testFromString() throws Exception {
   public void testFromInvalidString() throws Exception {
     Env.fromString("someInvalidEnv");
   }
+
+  @Test
+  public void fixTypoInProductionTest() {
+    Env prod = Env.fromString("PROD");
+    assertEquals(prod, Env.PRO);
+  }
+
+  @Test(expected = IllegalArgumentException.class)
+  public void fromBlankStringTest() {
+    Env.fromString("");
+  }
+
+  @Test(expected = IllegalArgumentException.class)
+  public void fromSpacesStringTest() {
+    Env.fromString("    ");
+  }
+
+  @Test(expected = IllegalArgumentException.class)
+  public void fromNullStringTest() {
+    Env.fromString(null);
+  }
+
 }