port another test

test/bats/fast.bats

@@ -1,5 +1,7 @@
 #!/usr/bin/env bats
 
+load test_helper
+
 NVM_SRC_DIR="${BATS_TEST_DIRNAME}/../.."
 load "${NVM_SRC_DIR}/nvm.sh"
 
@@ -20,13 +22,25 @@ teardown() {
 
 @test "'nvm' command defined in environment" {
     run nvm
-    [ "$status" -eq 0 ]
+    assert_equal "$status" "0" "nvm command defined"
 }
 
 @test "Running 'nvm alias' should create a file in the alias directory." {
     run nvm alias test v0.1.2
     [ "$status" -eq 0 ]
     result=$(cat "alias/test")
-    [ "$result" = "v0.1.2" ]
+    assert_equal "$result" "v0.1.2" "expected new alias"
+}
+
+@test './Listing versions/Running "nvm ls 0.0.2" should display only version 0.0.2.' {
+
+    mkdir -p v0.0.2
+    mkdir -p v0.0.20
+
+    run nvm ls 0.0.2
+    assert_match ${lines[0]} "v0.0.2" "nvm ls 0.0.2 must contain v0.0.2"
+
+    run nvm ls 0.0.2
+    assert_nomatch "$output" "v0.0.20"  "nvm ls 0.0.2 must NOT contain v0.0.20"
 }
 

test/bats/test_helper.bash

@@ -60,6 +60,24 @@ assert_equal() {
   fi
 }
 
+assert_match() {
+  if [[ ! "$1" =~ $2 ]]; then
+    { [ -z "$3" ] || echo "$3"
+      echo "expected: $1"
+      echo "to match: $2"
+    } | flunk
+  fi
+}
+
+assert_nomatch() {
+  if [[ "$1" =~ $2 ]]; then
+    { [ -z "$3" ] || echo "$3"
+      echo "expected    : $1"
+      echo "to not match: $2"
+    } | flunk
+  fi
+}
+
 assert_unequal() {
   if [ "$1" = "$2" ]; then
     { [ -z "$3" ] || echo "$3"