Alerting: Add multiple threshold operators (#99516)

The following operators are being added:
- Equal
- Not Equal
- Greater or Equal
- Less or Equal
- Within Range Inclusive
- Outside Range Inclusive

pkg/expr/threshold_test.go

@@ -38,6 +38,26 @@ func TestNewThresholdCommand(t *testing.T) {
 			args:        []float64{0},
 			shouldError: false,
 		},
+		{
+			fn:          "eq",
+			args:        []float64{0},
+			shouldError: false,
+		},
+		{
+			fn:          "ne",
+			args:        []float64{0},
+			shouldError: false,
+		},
+		{
+			fn:          "gte",
+			args:        []float64{0},
+			shouldError: false,
+		},
+		{
+			fn:          "lte",
+			args:        []float64{0},
+			shouldError: false,
+		},
 		{
 			fn:          "within_range",
 			args:        []float64{0, 1},
@@ -48,6 +68,16 @@ func TestNewThresholdCommand(t *testing.T) {
 			args:        []float64{0, 1},
 			shouldError: false,
 		},
+		{
+			fn:          "within_range_included",
+			args:        []float64{0, 1},
+			shouldError: false,
+		},
+		{
+			fn:          "outside_range_included",
+			args:        []float64{0, 1},
+			shouldError: false,
+		},
 		{
 			fn:            "gt",
 			args:          []float64{},
@@ -60,6 +90,30 @@ func TestNewThresholdCommand(t *testing.T) {
 			shouldError:   true,
 			expectedError: "incorrect number of arguments",
 		},
+		{
+			fn:            "eq",
+			args:          []float64{},
+			shouldError:   true,
+			expectedError: "incorrect number of arguments",
+		},
+		{
+			fn:            "ne",
+			args:          []float64{},
+			shouldError:   true,
+			expectedError: "incorrect number of arguments",
+		},
+		{
+			fn:            "gte",
+			args:          []float64{},
+			shouldError:   true,
+			expectedError: "incorrect number of arguments",
+		},
+		{
+			fn:            "lte",
+			args:          []float64{},
+			shouldError:   true,
+			expectedError: "incorrect number of arguments",
+		},
 		{
 			fn:            "within_range",
 			args:          []float64{0},
@@ -72,6 +126,18 @@ func TestNewThresholdCommand(t *testing.T) {
 			shouldError:   true,
 			expectedError: "incorrect number of arguments",
 		},
+		{
+			fn:            "within_range_included",
+			args:          []float64{0},
+			shouldError:   true,
+			expectedError: "incorrect number of arguments",
+		},
+		{
+			fn:            "outside_range_included",
+			args:          []float64{0},
+			shouldError:   true,
+			expectedError: "incorrect number of arguments",
+		},
 	}
 
 	for _, tc := range cases {
@@ -249,6 +315,22 @@ func TestIsSupportedThresholdFunc(t *testing.T) {
 			function:  ThresholdIsBelow,
 			supported: true,
 		},
+		{
+			function:  ThresholdIsEqual,
+			supported: true,
+		},
+		{
+			function:  ThresholdIsNotEqual,
+			supported: true,
+		},
+		{
+			function:  ThresholdIsGreaterThanEqual,
+			supported: true,
+		},
+		{
+			function:  ThresholdIsLessThanEqual,
+			supported: true,
+		},
 		{
 			function:  ThresholdIsWithinRange,
 			supported: true,
@@ -257,6 +339,14 @@ func TestIsSupportedThresholdFunc(t *testing.T) {
 			function:  ThresholdIsOutsideRange,
 			supported: true,
 		},
+		{
+			function:  ThresholdIsWithinRangeIncluded,
+			supported: true,
+		},
+		{
+			function:  ThresholdIsOutsideRangeIncluded,
+			supported: true,
+		},
 		{
 			function:  "foo",
 			supported: false,