[ENHANCEMENT]: TimeSeriesChart Schema fix + additional tests (#380)

* [ENHANCEMENT]: Improve min/max validation in time-series chart schema

Signed-off-by: Akshay Iyyadurai Balasundaram <akshay.iyyadurai.balasundaram@sap.com>

* review comment changes

Signed-off-by: Akshay Iyyadurai Balasundaram <akshay.iyyadurai.balasundaram@sap.com>

---------

Signed-off-by: Akshay Iyyadurai Balasundaram <akshay.iyyadurai.balasundaram@sap.com>

Author: ibakshay

timeserieschart/schemas/migrate/tests/basic-3/expected.json

@@ -0,0 +1,22 @@
+{
+  "kind": "TimeSeriesChart",
+  "spec": {
+    "legend": {
+      "mode": "list",
+      "position": "bottom",
+      "values": []
+    },
+    "visual": {
+      "areaOpacity": 0.1,
+      "connectNulls": false,
+      "display": "line",
+      "lineWidth": 1
+    },
+    "yAxis": {
+      "format": {
+        "unit": "decimal"
+      },
+      "max": 1
+    }
+  }
+}

timeserieschart/schemas/migrate/tests/basic-3/input.json

@@ -0,0 +1,97 @@
+{
+  "id": 14,
+  "type": "timeseries",
+  "title": "APIC endpoint accessibility",
+  "gridPos": {
+    "x": 0,
+    "y": 0,
+    "h": 8,
+    "w": 11
+  },
+  "fieldConfig": {
+    "defaults": {
+      "custom": {
+        "drawStyle": "line",
+        "lineInterpolation": "linear",
+        "barAlignment": 0,
+        "barWidthFactor": 0.6,
+        "lineWidth": 1,
+        "fillOpacity": 10,
+        "gradientMode": "none",
+        "spanNulls": false,
+        "insertNulls": false,
+        "showPoints": "never",
+        "pointSize": 5,
+        "stacking": {
+          "mode": "none",
+          "group": "A"
+        },
+        "axisPlacement": "auto",
+        "axisLabel": "",
+        "axisColorMode": "text",
+        "axisBorderShow": false,
+        "scaleDistribution": {
+          "type": "linear"
+        },
+        "axisCenteredZero": false,
+        "hideFrom": {
+          "tooltip": false,
+          "viz": false,
+          "legend": false
+        },
+        "thresholdsStyle": {
+          "mode": "off"
+        }
+      },
+      "color": {
+        "mode": "palette-classic"
+      },
+      "mappings": [],
+      "thresholds": {
+        "mode": "absolute",
+        "steps": [
+          {
+            "value": null,
+            "color": "green"
+          },
+          {
+            "value": 80,
+            "color": "red"
+          }
+        ]
+      },
+      "unit": "short",
+      "max": 1
+    },
+    "overrides": []
+  },
+  "pluginVersion": "12.1.1",
+  "targets": [
+    {
+      "expr": "network_apic_accessible",
+      "interval": "",
+      "legendFormat": "{{ apicHost }}",
+      "refId": "A",
+      "datasource": {
+        "uid": "prometheus-infra-collector"
+      }
+    }
+  ],
+  "datasource": {
+    "uid": "prometheus-infra-collector"
+  },
+  "options": {
+    "tooltip": {
+      "mode": "multi",
+      "sort": "none",
+      "hideZeros": false
+    },
+    "legend": {
+      "showLegend": true,
+      "displayMode": "list",
+      "placement": "bottom",
+      "calcs": []
+    },
+    "dataLinks": []
+  }
+}

timeserieschart/schemas/time-series.cue

@@ -52,7 +52,10 @@ spec: close({
 	label?:  string
 	format?: common.#format
 	min?:    number
-	max?:    number & >= min
+	max?:    number
+	if min != _|_ && max != _|_ {
+		max: >=min
+	}
 }
 
 #querySettings: [...{