Expressions: Move GEL into core as expressions (#29072)

* comes from grafana/gel-app * remove transform plugin code * move __expr__ and -100 constants to expr pkg * set OrgID on request plugin context * use gtime for resample duration * in resample, rename "rule" to "window", use gtime for duration, parse duration before exec * remove gel entry from plugins-bundled/external.json which creates an empty array for plugins
2020-11-19 07:17:00 -05:00
parent f01c3f35e1
commit 0cb29d337a
44 changed files with 5770 additions and 401 deletions
@@ -0,0 +1,88 @@
+package mathexp
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestFunc(t *testing.T) {
+	var tests = []struct {
+		name      string
+		expr      string
+		vars      Vars
+		newErrIs  assert.ErrorAssertionFunc
+		execErrIs assert.ErrorAssertionFunc
+		resultIs  assert.ComparisonAssertionFunc
+		results   Results
+	}{
+		{
+			name: "abs on number",
+			expr: "abs($A)",
+			vars: Vars{
+				"A": Results{
+					[]Value{
+						makeNumber("", nil, float64Pointer(-7)),
+					},
+				},
+			},
+			newErrIs:  assert.NoError,
+			execErrIs: assert.NoError,
+			resultIs:  assert.Equal,
+			results:   Results{[]Value{makeNumber("", nil, float64Pointer(7))}},
+		},
+		{
+			name:      "abs on scalar",
+			expr:      "abs(-1)",
+			vars:      Vars{},
+			newErrIs:  assert.NoError,
+			execErrIs: assert.NoError,
+			resultIs:  assert.Equal,
+			results:   Results{[]Value{NewScalar(float64Pointer(1.0))}},
+		},
+		{
+			name: "abs on series",
+			expr: "abs($A)",
+			vars: Vars{
+				"A": Results{
+					[]Value{
+						makeSeriesNullableTime("", nil, nullTimeTP{
+							unixTimePointer(5, 0), float64Pointer(-2),
+						}, nullTimeTP{
+							unixTimePointer(10, 0), float64Pointer(-1),
+						}),
+					},
+				},
+			},
+			newErrIs:  assert.NoError,
+			execErrIs: assert.NoError,
+			resultIs:  assert.Equal,
+			results: Results{
+				[]Value{
+					makeSeriesNullableTime("", nil, nullTimeTP{
+						unixTimePointer(5, 0), float64Pointer(2),
+					}, nullTimeTP{
+						unixTimePointer(10, 0), float64Pointer(1),
+					}),
+				},
+			},
+		},
+		{
+			name:     "abs on string - should error",
+			expr:     `abs("hi")`,
+			vars:     Vars{},
+			newErrIs: assert.Error,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			e, err := New(tt.expr)
+			tt.newErrIs(t, err)
+			if e != nil {
+				res, err := e.Execute(tt.vars)
+				tt.execErrIs(t, err)
+				tt.resultIs(t, tt.results, res)
+			}
+		})
+	}
+}