Make value mappings correctly interpret numeric-like strings (#30893)

* Make value mappings corectly interprete numeric-like strings

* More tests

* Update packages/grafana-data/src/utils/valueMappings.ts

* Update packages/grafana-data/src/utils/valueMappings.ts

Co-authored-by: Hugo Häggmark <hugo.haggmark@grafana.com>

* Fix issue detected by singlestat test

Co-authored-by: Hugo Häggmark <hugo.haggmark@grafana.com>

packages/grafana-data/src/utils/valueMappings.test.ts

-import { getMappedValue } from './valueMappings';
+import { getMappedValue, isNumeric } from './valueMappings';
 import { ValueMapping, MappingType } from '../types';
 
 describe('Format value with value mappings', () => {
@@ -79,14 +79,75 @@ describe('Format value with value mappings', () => {
     expect(getMappedValue(valueMappings, value).text).toEqual('1-20');
   });
 
-  it('should map value text to mapping', () => {
-    const valueMappings: ValueMapping[] = [
-      { id: 0, text: '1-20', type: MappingType.RangeToText, from: '1', to: '20' },
-      { id: 1, text: 'ELVA', type: MappingType.ValueToText, value: 'elva' },
-    ];
-
-    const value = 'elva';
+  describe('text mapping', () => {
+    it('should map value text to mapping', () => {
+      const valueMappings: ValueMapping[] = [
+        { id: 0, text: '1-20', type: MappingType.RangeToText, from: '1', to: '20' },
+        { id: 1, text: 'ELVA', type: MappingType.ValueToText, value: 'elva' },
+      ];
+
+      const value = 'elva';
+
+      expect(getMappedValue(valueMappings, value).text).toEqual('ELVA');
+    });
+
+    it.each`
+      value            | expected
+      ${'2/0/12'}      | ${{ id: 1, text: 'mapped value 1', type: MappingType.ValueToText, value: '2/0/12' }}
+      ${'2/1/12'}      | ${undefined}
+      ${'2:0'}         | ${{ id: 3, text: 'mapped value 3', type: MappingType.ValueToText, value: '2:0' }}
+      ${'2:1'}         | ${undefined}
+      ${'20whatever'}  | ${{ id: 2, text: 'mapped value 2', type: MappingType.ValueToText, value: '20whatever' }}
+      ${'20whateve'}   | ${undefined}
+      ${'20'}          | ${undefined}
+      ${'00020.4'}     | ${undefined}
+      ${'192.168.1.1'} | ${{ id: 4, text: 'mapped value ip', type: MappingType.ValueToText, value: '192.168.1.1' }}
+      ${'192'}         | ${undefined}
+      ${'192.168'}     | ${undefined}
+      ${'192.168.1'}   | ${undefined}
+      ${'9.90'}        | ${{ id: 5, text: 'OK', type: MappingType.ValueToText, value: '9.9' }}
+    `('numeric-like text mapping, value:${value', ({ value, expected }) => {
+      const valueMappings: ValueMapping[] = [
+        { id: 1, text: 'mapped value 1', type: MappingType.ValueToText, value: '2/0/12' },
+        { id: 2, text: 'mapped value 2', type: MappingType.ValueToText, value: '20whatever' },
+        { id: 3, text: 'mapped value 3', type: MappingType.ValueToText, value: '2:0' },
+        { id: 4, text: 'mapped value ip', type: MappingType.ValueToText, value: '192.168.1.1' },
+        { id: 5, text: 'OK', type: MappingType.ValueToText, value: '9.9' },
+      ];
+      expect(getMappedValue(valueMappings, value)).toEqual(expected);
+    });
+  });
+});
 
-    expect(getMappedValue(valueMappings, value).text).toEqual('ELVA');
+describe('isNumeric', () => {
+  it.each`
+    value         | expected
+    ${123}        | ${true}
+    ${'123'}      | ${true}
+    ${' 123'}     | ${true}
+    ${' 123 '}    | ${true}
+    ${-123.4}     | ${true}
+    ${'-123.4'}   | ${true}
+    ${0.41}       | ${true}
+    ${'.41'}      | ${true}
+    ${0x12}       | ${true}
+    ${'0x12'}     | ${true}
+    ${'000123.4'} | ${true}
+    ${2e64}       | ${true}
+    ${'2e64'}     | ${true}
+    ${1e10000}    | ${true}
+    ${'1e10000'}  | ${true}
+    ${Infinity}   | ${true}
+    ${'abc'}      | ${false}
+    ${' '}        | ${false}
+    ${null}       | ${false}
+    ${undefined}  | ${false}
+    ${NaN}        | ${false}
+    ${''}         | ${false}
+    ${{}}         | ${false}
+    ${true}       | ${false}
+    ${[]}         | ${false}
+  `('detects numeric values', ({ value, expected }) => {
+    expect(isNumeric(value)).toEqual(expected);
   });
 });

packages/grafana-data/src/utils/valueMappings.ts

@@ -15,20 +15,23 @@ const addValueToTextMappingText = (
     return allValueMappings.concat(valueToTextMapping);
   }
 
-  const valueAsNumber = parseFloat(value as string);
-  const valueToTextMappingAsNumber = parseFloat(valueToTextMapping.value as string);
+  let valueAsNumber, valueToTextMappingAsNumber;
+
+  if (isNumeric(value as string) && isNumeric(valueToTextMapping.value)) {
+    valueAsNumber = parseFloat(value as string);
+    valueToTextMappingAsNumber = parseFloat(valueToTextMapping.value as string);
 
-  if (isNaN(valueAsNumber) || isNaN(valueToTextMappingAsNumber)) {
-    if (value === valueToTextMapping.value) {
+    if (valueAsNumber === valueToTextMappingAsNumber) {
       return allValueMappings.concat(valueToTextMapping);
     }
+    return allValueMappings;
   }
 
-  if (valueAsNumber !== valueToTextMappingAsNumber) {
-    return allValueMappings;
+  if (value === valueToTextMapping.value) {
+    return allValueMappings.concat(valueToTextMapping);
   }
 
-  return allValueMappings.concat(valueToTextMapping);
+  return allValueMappings;
 };
 
 const addRangeToTextMappingText = (
@@ -93,3 +96,12 @@ const isNullValueMap = (mapping: ValueMap): boolean => {
   }
   return mapping.value.toLowerCase() === 'null';
 };
+
+// Ref https://stackoverflow.com/a/42356340
+export function isNumeric(num: any) {
+  if (num === true) {
+    return false;
+  }
+
+  return Boolean(Number(num));
+}