Assert empty

.env.example

@@ -1 +1,2 @@
 PARALLEL_RUN=
+

CHANGELOG.md

@@ -8,6 +8,8 @@
 - Added `assertCommandNotFound`
 - Added `assertArrayContains`
 - Added `assertArrayNotContains`
+- Added `assertEmpty`
+- Added `assertNotEmpty`
 - Improved the readability of the assert by using guard clause
 - Update documentation
 - Add support for the static analysis on MacOS

src/assert.sh

@@ -14,6 +14,32 @@ function assertEquals() {
   ((_ASSERTIONS_PASSED++))
 }
 
+function assertEmpty() {
+  local expected="$1"
+  local label="${3:-$(normalizeTestFunctionName "${FUNCNAME[1]}")}"
+
+  if [[ "$expected" != "" ]]; then
+    ((_ASSERTIONS_FAILED++))
+    printFailedTest  "${label}" "to be empty" "but got" "${expected}"
+    return
+  fi
+
+  ((_ASSERTIONS_PASSED++))
+}
+
+function assertNotEmpty() {
+  local expected="$1"
+  local label="${3:-$(normalizeTestFunctionName "${FUNCNAME[1]}")}"
+
+  if [[ "$expected" == "" ]]; then
+    ((_ASSERTIONS_FAILED++))
+    printFailedTest  "${label}" "to not be empty" "but got" "${expected}"
+    return
+  fi
+
+  ((_ASSERTIONS_PASSED++))
+}
+
 function assertNotEquals() {
   local expected="$1"
   local actual="$2"

tests/unit/assert_test.sh

@@ -12,6 +12,26 @@ function test_unsuccessful_assertEquals() {
     "$(assertEquals "1" "2")"
 }
 
+function test_successful_assertEmpty() {
+  assertEquals "$SUCCESSFUL_EMPTY_MESSAGE" "$(assertEmpty "")"
+}
+
+function test_unsuccessful_assertEmpty() {
+  assertEquals\
+    "$(printFailedTest "Unsuccessful assertEmpty" "to be empty" "but got" "1")"\
+    "$(assertEmpty "1")"
+}
+
+function test_successful_assertNotEmpty() {
+  assertEquals "$SUCCESSFUL_EMPTY_MESSAGE" "$(assertNotEmpty "a_random_string")"
+}
+
+function test_unsuccessful_assertNotEmpty() {
+  assertEquals\
+    "$(printFailedTest "Unsuccessful assertNotEmpty" "to not be empty" "but got" "")"\
+    "$(assertNotEmpty "")"
+}
+
 function test_successful_assertNotEquals() {
   assertEquals "$SUCCESSFUL_EMPTY_MESSAGE" "$(assertNotEquals "1" "2")"
 }