diff --git a/sof-js/tests/fn_boundary.test.js b/sof-js/tests/fn_boundary.test.js
index 6a38874..7648dcb 100644
--- a/sof-js/tests/fn_boundary.test.js
+++ b/sof-js/tests/fn_boundary.test.js
@@ -1,5 +1,5 @@
-import { describe } from "bun:test";
-import { add_test, end_case, start_case } from "./test_helpers";
+import { describe } from 'bun:test'
+import { add_test, end_case, start_case } from './test_helpers.js'
 
 const resources = [
   {
@@ -7,26 +7,37 @@ const resources = [
     id: 'o1',
     code: { text: 'code' },
     status: 'final',
-    valueQuantity: { value: 1.0 }
+    valueQuantity: { value: 1.0 },
   },
   {
     resourceType: 'Observation',
     id: 'o2',
     code: { text: 'code' },
     status: 'final',
-    valueDateTime: '2010-10-10'
+    valueDateTime: '2010-10-10',
   },
   {
     resourceType: 'Observation',
     id: 'o3',
     code: { text: 'code' },
-    status: 'final'
-  }
-];
+    status: 'final',
+  },
+  {
+    resourceType: 'Observation',
+    id: 'o4',
+    code: { text: 'code' },
+    valueTime: '12:34',
+  },
+  {
+    resourceType: 'Patient',
+    id: 'p1',
+    birthDate: '1970-06',
+  },
+]
 
-start_case('fn_boundary', 'TBD', resources);
+start_case('fn_boundary', 'TBD', resources)
 
-describe('boundary functions', () => {
+describe('boundary tests', () => {
   add_test({
     title: 'decimal lowBoundary',
     view: {
@@ -38,18 +49,19 @@ describe('boundary functions', () => {
             { name: 'id', path: 'id' },
             {
               name: 'decimal',
-              path: 'value.ofType(Quantity).value.lowBoundary()'
-            }
-          ]
-        }
-      ]
+              path: 'value.ofType(Quantity).value.lowBoundary()',
+            },
+          ],
+        },
+      ],
     },
     expect: [
       { id: 'o1', decimal: 0.95 },
       { id: 'o2', decimal: null },
       { id: 'o3', decimal: null },
-    ]
-  });
+      { id: 'o4', decimal: null },
+    ],
+  })
 
   add_test({
     title: 'decimal highBoundary',
@@ -62,18 +74,19 @@ describe('boundary functions', () => {
             { name: 'id', path: 'id' },
             {
               name: 'decimal',
-              path: 'value.ofType(Quantity).value.highBoundary()'
-            }
-          ]
-        }
-      ]
+              path: 'value.ofType(Quantity).value.highBoundary()',
+            },
+          ],
+        },
+      ],
     },
     expect: [
       { id: 'o1', decimal: 1.05 },
       { id: 'o2', decimal: null },
       { id: 'o3', decimal: null },
-    ]
-  });
+      { id: 'o4', decimal: null },
+    ],
+  })
 
   add_test({
     title: 'datetime lowBoundary',
@@ -84,20 +97,18 @@ describe('boundary functions', () => {
         {
           column: [
             { name: 'id', path: 'id' },
-            {
-              name: 'datetime',
-              path: 'value.ofType(DateTime).lowBoundary()'
-            }
-          ]
-        }
-      ]
+            { name: 'datetime', path: 'value.ofType(dateTime).lowBoundary()' },
+          ],
+        },
+      ],
     },
     expect: [
-      { id: 'o1', decimal: null },
-      { id: 'o2', decimal: '2010-10-10T00:00:00.000+14:00' },
-      { id: 'o3', decimal: null },
-    ]
-  });
+      { id: 'o1', datetime: null },
+      { id: 'o2', datetime: '2010-10-10T00:00:00.000+14:00' },
+      { id: 'o3', datetime: null },
+      { id: 'o4', datetime: null },
+    ],
+  })
 
   add_test({
     title: 'datetime highBoundary',
@@ -108,20 +119,96 @@ describe('boundary functions', () => {
         {
           column: [
             { name: 'id', path: 'id' },
-            {
-              name: 'datetime',
-              path: 'value.ofType(DateTime).highBoundary()'
-            }
-          ]
-        }
-      ]
+            { name: 'datetime', path: 'value.ofType(dateTime).highBoundary()' },
+          ],
+        },
+      ],
     },
     expect: [
-      { id: 'o1', decimal: null },
-      { id: 'o2', decimal: '2010-10-10T23:59:59.999-12:00' },
-      { id: 'o3', decimal: null },
-    ]
-  });
+      { id: 'o1', datetime: null },
+      { id: 'o2', datetime: '2010-10-10T23:59:59.999-12:00' },
+      { id: 'o3', datetime: null },
+      { id: 'o4', datetime: null },
+    ],
+  })
+
+  add_test({
+    title: 'date lowBoundary',
+    view: {
+      resource: 'Patient',
+      status: 'active',
+      select: [
+        {
+          column: [
+            { name: 'id', path: 'id' },
+            { name: 'date', path: 'birthDate.lowBoundary()' },
+          ],
+        },
+      ],
+    },
+    expect: [{ id: 'p1', date: '1970-06-01' }],
+  })
+
+  add_test({
+    title: 'date highBoundary',
+    view: {
+      resource: 'Patient',
+      status: 'active',
+      select: [
+        {
+          column: [
+            { name: 'id', path: 'id' },
+            { name: 'date', path: 'birthDate.highBoundary()' },
+          ],
+        },
+      ],
+    },
+    expect: [{ id: 'p1', date: '1970-06-30' }],
+  })
+
+  add_test({
+    title: 'time lowBoundary',
+    view: {
+      resource: 'Observation',
+      status: 'active',
+      select: [
+        {
+          column: [
+            { name: 'id', path: 'id' },
+            { name: 'time', path: 'value.ofType(time).lowBoundary()' },
+          ],
+        },
+      ],
+    },
+    expect: [
+      { id: 'o1', time: null },
+      { id: 'o2', time: null },
+      { id: 'o3', time: null },
+      { id: 'o4', time: '12:34:00.000' },
+    ],
+  })
+
+  add_test({
+    title: 'time highBoundary',
+    view: {
+      resource: 'Observation',
+      status: 'active',
+      select: [
+        {
+          column: [
+            { name: 'id', path: 'id' },
+            { name: 'time', path: 'value.ofType(time).highBoundary()' },
+          ],
+        },
+      ],
+    },
+    expect: [
+      { id: 'o1', time: null },
+      { id: 'o2', time: null },
+      { id: 'o3', time: null },
+      { id: 'o4', time: '12:34:59.999' },
+    ],
+  })
 
-  end_case();
-});
+  end_case()
+})