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SC1-1-1-longdesc
This test case belongs to 1.1.1 Non-text Content
Status
Contents
Description
This test checks the sufficient provision of a long text description for non-text content using the longdesc attribute. This test doesn't check the accessibility of a page referenced to from the longdesc attribute and this page must be checked separately.
Background
- G73: Providing a long description in another location with a link to it that is immediately adjacent to the non-text content
- G74: Providing a long description in text near the non-text content, with a reference to the location of the long description in the short description
- G92: Providing long description for non-text content that serves the same purpose and presents the same information
- H45: Using longdesc
- F67: Failure of Success Criterion 1.1.1 and 1.2.1 due to providing long descriptions for non-text content that does not serve the same purpose or does not present the same information
- The proper provision of a short text alternative is checked in SC1-1-1-text-alternative
Assumptions
- The test assumes that a page referenced within the longdesc attribute is accessible.
Test properties
| Property | Value |
|---|---|
| Test name | Proper use of longdesc |
| Success Criterion | 1.1.1 Non-text Content |
| Test mode | SemiAuto |
| Test environment | rendered page |
| Test subject | web page state |
| User expertise and skills | No prior knowledge |
| User profile | Requires sight |
Test procedure
Selector
earl:automatic
//img[@longdesc]
Step 1
earl:automatic
Check if the longdesc attribute value is a valid URL
if yes continue with #Step 2
else return
| Property | Value |
|---|---|
| TestCase | SC1-1-1-longdesc |
| Identifier | SC1-1-1-longdesc-fail1 |
| Outcome | failed |
| ErrorMessage | LONGDESC attribute value is not a valid URL |
| Pointer | position |
| Info |
Step 2
earl:automatic
Check if the resource referenced in the longdesc attribute value exists
if yes, continue with #Step 3
else return
| Property | Value |
|---|---|
| TestCase | SC1-1-1-longdesc |
| Identifier | SC1-1-1-longdesc-fail2 |
| Outcome | failed |
| ErrorMessage | LONGDESC reference does not exist |
| Pointer | position |
| Info | The URL given as LONGDESC value was not retrievable. |
Step 3
earl:manual
Concatenate the results of Text Alternative Computation Algorithm run on the element and assign it to variable T1.
User input question
Item presented to the user: Image with T1 and the content of the page referenced by the longdesc at the referenced anchor point (if applicable)
Question: Does the alternative provide an extended description of the image additionally to T1?
Answer options: "yes/no"
Help text: If the images contribute meaning to the page or provide any functionality or convey information additional to the pages text, this must be described. The alternative may be an entire page. The main content of which should provide the description.
Repair suggestion: If no, could you suggest an alternative, which would sufficiently describe the image?
Properties of the test step:
- context-sensitive = yes
- user interaction (with the web content) required = yes
if yes, return
| Property | Value |
|---|---|
| TestCase | SC1-1-1-longdesc |
| Identifier | SC1-1-1-longdesc-pass1 |
| Outcome | passed |
| Pointer | position |
| Info |
else return
| Property | Value |
|---|---|
| TestCase | SC1-1-1-longdesc |
| Identifier | SC1-1-1-longdesc–fail3 |
| Outcome | failed |
| ErrorMessage | Long description not sufficiently descriptive. |
| Pointer | position |
| Info | Collection of repair suggestions |